overview-manual: Fixed typo.

"eSDSK" -> "eSDK"

(From yocto-docs rev: 01d61e03cf004559ecccb43e8114b20823766bfa)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/overview-manual/overview-manual-yp-intro.xml

@@ -1157,7 +1157,7 @@
                     </para></listitem>
                 <listitem><para>
                     The build system generates the file system image and a
-                    customized Extensible SDK (eSDSK) for application
+                    customized Extensible SDK (eSDK) for application
                     development in parallel.
                     </para></listitem>
             </orderedlist>